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Your system should be serviced each year. Have you been changing your filter as required? We aren't telling you the system is dead or dieing. But, just like your car, maintenance is a requirement. Or you can kill it.
Many companies have a clause in their warranty that provides no coverage if minimal annual maintenance cannot be proven.
Your filter should not be wet. You have an issue, please call a professional to help you with it.

Do not argue with an idiot. He will drag you down to his level and beat you with experience.

Its not uncommon for air conditioners to need to be cleaned after 1 year, let alone 2 years.

If this is a HP, or an A/C, on a furnace. All the air for heating and cooling go through it.

Its been installed for 17,520 hours, if its 2 years old.
If it only ran 10&#37; of that time for heating and cooling, it has ran for 1,752 hours.
If it were a car, and you drove it at 35 miles an hour, for 1,752 hours, you would have put 61,320 miles on your car in that same time period. that would be like driving 30,660 miles a year.

With that kind of usage, it deserves to be serviced at least once a year.

i change the filter every month. i live in florida, and a/c is set at 78 degrees. its not running hard like like if i would have set it to say 70 degrees.
shouldn't a/c units last longer then 2 years? problems like this start in 2 years? i lived in my parents house growing up, and never ever had a problem with the a/c unit, and that is 10 plus years

Please call a professional to service your system. We cannot tell you what is wrong from here, not to mention DIY is against the site rules.
Would you try to diagnose someone's car problems over the internet? Especially if they've driven it every day for two years and never had any of the recommended services?

Do not argue with an idiot. He will drag you down to his level and beat you with experience.